Coral Reef Diagnostics

Maldives - Anantara Kihavah house reef & Golden Wall

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05
Photo: Anderson Mayfield/Coral Reef Diagnostics
Country
Survey date(s)
2016-01-22
2016-01-25
Coordinates
5.2965, 73.0568
This site is in the vicinity of a land-based point.
Coral cover
17%
Mean of 2 computer vision methods (DINOv3, CoralSCOP) · all values below
Observations
Heat stress
Most recent heat load record
26 Oct 2026 · Bleaching Watch
5-year thermal stress load
5-year mean max. degree heating weeks (DHW)
2021–2025
NOAA Coral Reef Watch — Maldives virtual station
i 5-year mean max. DHW is the mean of the annual maximum DHWs over the five complete years named above, not conditions today.
More infoMaldives (NOAA CRW virtual station)
Photographs
97
26 shown on this page
Site summary
Read this summary in:

Kihavah's house reef centers on an underwater restaurant ringed by coral-nursery domes and anemone carpets, while a drift along its outer wall found a crown-of-thorns starfish and a stark white feeding scar amid brilliant yellow soft-coral faces. Weeks after these January 2016 photos, the 2016 El Niño arrived, and Baa's surveyed reefs were 82–97% bleached by April (Coral Reef CPR transects).

Max. depth dived
24.4 m
sample-sheet maximum
Sea surface temp. (satellite)
29.2°C
mean; range 28.8–29.6°C
satellite sea surface temperature (SST), mean of the 2 survey dates (NOAA Coral Reef Watch, Maldives), not an in-water reading; it is the warmest-pixel (90th percentile) reading in the station area and can run 1–1.5°C above the reef

14 of the 26 photographs on this page are shown beside the text that discusses them under "Site description" below.

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Photo credit & attribution

Site description

Setting

Kihavah was the Baa Atoll base for the January 2016 expedition, and even its dinner table came with a reef attached: the resort's underwater restaurant sits nose-deep in the house reef, its windows framing coral bommies upholstered in waving sea-anemone carpets, patrolled by sergeant majors and drifting clouds of orange anthias — with the coral nursery's dome frames visible out on the sand (e.g., Image 12, Image 13, Image 14, Image 15, Image 16, Image 17).

After dark, the jetty lights turn the shallows amber and stingrays come sailing through the glow like slow kites. The seaplane ride in is its own natural-history lesson, the aerial sequence tracing Baa's ring reefs and faros in turquoise relief.

General benthic features

A drift along the house reef's sheer outer wall told a different story: whole faces tiled in brilliant yellow soft corals, the classic livery of a current-swept Maldivian drop-off, set off by red sponge and pink coralline crusts, with dark bushy colonies rooted in the sand at its foot like black corals (e.g., Image 1, Image 2, Image 3, Image 5, Image 6).

Coral cover

Stressors

On the 22 January 2016 house-reef drift, Anderson photographed a crown-of-thorns starfish out on the rubble (e.g., Image 26) and a table coral with a stark white feeding scar (e.g., Image 7).

Weeks after the visit, the 2016 El Niño arrived; Baa's surveyed reefs were 82–97% bleached by April (Coral Reef CPR transects, April 2016; we were part of the CPR team), making these frames a quiet time capsule.

Fish and other fauna

Glassy sweepers seethed beneath a ledge (e.g., Image 4), fusiliers and damselfish streamed along the rim, and trevallies patrolled the pink light near the surface.

Comparisons with other data

We found no other surveys at this site as of 2026. If you would like to share yours, please email us.

Other notes

This marker covers two Baa Atoll dives, the Kihavah house reef and Golden Wall. At Golden Wall, a diver dropping in over the rubble is first mobbed by bannerfish — hundreds of them, banded black and white with trailing yellow fins, packed so densely they read as weather rather than fish. Then the wall arrives: a sheer face plated top to bottom in golden soft corals, glowing amber through the violet haze, dusted with drifting anthias and patrolled by dark damselfish, with a black bushy coral clawing out into the current. The dive ends on a sunny shallow plain of dome-shaped Porites corals scattered like boulders across white sand. House-reef research notes from this stay even earned a corner on the resort's conservation board.

CV model comparison

No computer-vision method yet estimates coral cover accurately on new images, so treat this as indicative rather than a measurement; it is revised as the methods improve.
CoralSCOP (SAM-based) mask-sum is the summed area of all segmented colonies as a fraction of the frame, averaged over the site's photos.
More infoMask-sum reads high where colonies overlap or where non-scleractinian cover is segmented, and is not directly comparable to a manual point-count. This CoralSCOP and DINOv3 figure is expected to change: Anderson is evaluating newer CV models and will update it once a better one is found.
MethodHard coral cover (%)Photos (n) ± SE
In-house DINOv314.7
CoralSCOP edited19.3
Mean (± SD)17.0 ± 3.3
Range14.7–19.3

The two computer-vision methods agree within 4.6 pp (mean 17.0%).

Mean ± SD and range are across the computer-vision methods shown.

Data & links

All images from Coral Reef Diagnostics. Data are from Coral Reef Diagnostics and Coral Reef CPR.

© Coral Reef Diagnostics.